Alloy L605 Cobalt
Cobalt L-605 (also known as alloy 25) is a cobalt-based superalloy with high levels of chromium and tungsten. It is characterized by outstanding high-temperature strength up to 1500 °F (1093 °C), excellent oxidation resistance at high temperatures up to 2000 °F (1093 °C) in corrosive environments, and superior resistance to sulfidation wear and galling. Cobalt L-605 has other less-known qualities like high ductility and biocompatibility. Cobalt L-605 is non-magnetic.
Chemical Composition of Cobalt L-605
| Element | Min (%) | Max (%) |
| Carbon, C | 0.05 | 0.15 |
| Manganese, Mn | — | ≤ 2.00 |
| Silicon, Si | — | ≤ 0.40 |
| Sulfur, S | — | ≤ 0.015 |
| Phosphorus, P | — | ≤ 0.02 |
| Chromium, Cr | 19.0 | 21.0 |
| Molybdenum, Mo | 1.20 | 1.40 |
| Iron, Fe | — | ≤ 3.00 |
| Tungsten, W | 14.0 | 16.0 |
| Nickel, Ni | 9.0 | 11.0 |
| Cobalt, Co | — | *Balance |
Mechanical and Physical Properties
| Property | Imperial | Metric |
| Density | 0.335 lb/in3 | 9.27 g/cm3 |
| Melting Range | 2425 – 2570 °F | 1330 – 1410 °C |
| Tensile Strength | 154 ksi | 1061 MPa |
| Tensile Strength, Yield 0.2% | 75 ksi | 517 MPa |
| Elongation in 2 inches (50 mm) | 55 % | 55 % |
| Elongation A5 | 25 % | 25 % |
| Electrical Resistivity | 34.9 µΩ in | 88.6 µΩ cm |
| Magnetic Permeability at 200 oersteds | 1.002 | 1.002 |
| Thermal Conductivity | 65 Btu⋅in/ft2 h °F | 9.4 W/m K |
| Specific Heat | 0.092 Btu/lb °F | 385 J/kg °C |
| Coefficient of Thermal Expansion, RT – 200°F | 6.8 × 10-6 in/in °F | 12.3 µm/m °C |
| Resistance on air (up to the temperature listed) | 1994 °F | 1090 °C |
Availability
Available in Bar, Round Bar, Flat Bar, Plate, Strip, Sheet, Wire, Tube, Rod, Forging Stock and Extruded Section.
Thickness: 0.05--3.0mm
Diameter: 0.08--500mm
OD: 10--500mm, WT: 2.0--100mm
More grades we can supply:
Alloy 31
Alloy 33
Alloy 36
Alloy 42
Alloy 46
Alloy 52
Alloy 32-5
Alloy 2917
Alloy 59
Hastelloy B
Hastelloy B-2
Hastelloy B-3
Hastelloy B-4
Hastelloy C
Hastelloy C-4
Hastelloy C-22
Hastelloy G-50
Hastelloy G
Hastelloy G-3
Hastelloy G-30
Hastelloy G-2000
